In surgical planing, the revolving brush drives blood and debris from the field over the operator. The quantity thrown up is such that one must wear a plastic face mask.1 Though protecting the operator, such devices quickly become coated with blood and frequent stops are necessary to wipe them clean. Guards are available for certain types of apparatus used for the operation, such as the Schreus grinder,2 but are so constructed that they
The silver brush guard shown in perspective and in position on the handpiece. Dimensions of the various parts are given in inches. almost completely enclose the abrasive head and thus impede the operator's view of his field.
The present guard (Fig. 1) allows a good view of the brush and of the patient's skin, and at the same time prevents any blood from spraying up. After sterilization, it is simply pushed on to the handpiece,